ISO 21787:2006规定了用于隔离和控制服务的热塑性材料制成的截止阀的设计、功能特性和制造要求，以及截止阀与管道系统的连接、阀体材料及其在-40摄氏度和+120摄氏度之间的压力/温度额定值，使用寿命为25年，并规定了其试验。 ISO 21787:2006适用于安装在工业管道系统中的手动或电动阀门，无论应用领域和输送的流体如何。 国际标准涉及DN 10的范围；DN 15、DN 20、DN 25、DN 40、DN 50、DN 65、DN 80、DN 100、DN 125和DN 150，以及PN 6、PN 10、PN 16和150级的范围。

ISO 21787:2006 specifies requirements for the design, functional characteristics and manufacture of globe valves made of thermoplastics materials intended for isolating and control service, their connection to the pipe system, the body materials and their pressure/temperature rating between -40 degrees Celsius and +120 degrees Celsius, for a lifetime of 25 years, and also specifies their tests. ISO 21787:2006 is applicable to hand- or power-operated valves to be installed in industrial pipe systems, irrespective of the field of application and the fluids to be conveyed. It International Standard is concerned with the range of DN 10; DN 15, DN 20, DN 25, DN 40, DN 50, DN 65, DN 80, DN 100, DN 125 and DN 150, and the range of PN 6, PN 10, PN 16 and Class 150.